<style>
    body {
        margin: 0;
        margin: 10px;
    }


    img {
        display: block;
        margin-left: auto;
        margin-right: auto;
    }
</style>


<div>
  <img src="http://assets.imedao.com/images/logos/logo_xueqiu_180/logo_xueqiu_180-08.png" />
</div>
